The problem Ferrari and Vettel cannot ignore

After his latest error in the United States Grand Prix arguably cost Sebastian Vettel another race win, it's time he and his Ferrari team did some serious soul-searching and react to the problem that is stopping them winning Formula 1 titles

Another race, another Sebastian Vettel error. For the third time in five races, the number five Ferrari ended up facing the wrong way early in a grand prix after contact with a rival. The lost points tally rises ever higher.

It's simple to point to the mistakes and discuss how they have impacted the championship, since nobody can deny there has been a very significant swing in Lewis Hamilton's favour thanks to Vettel's mishaps. But they have shaped the season in an even more significant way, one that the United States Grand Prix weekend laid bare, and could yet have an impact on 2019 - be it for better or for worse.